Double envelope



March 20, 1928. 1,662,843

C. F. BACKMYER DOUBLE ENVELOPE Filed Auz. 5, 1925 f B iq-B060. E

| CHICAGO-0 YUCK THIS FL P UNDER EEL L M 1 -02 G FIRST CLASS MAIL HERE THIRD CLAS? MAIL HERE H 45 2; 6 w an 1 fiy4 irtor/ze z/a 65 tion of the stamps as at C Patented Mar. 20; 1928.

I UNITED STATES PATENT 1,662,843 OFFICE. 4

HEIMER COMPANY, OF CHICAGO,

ILLINOIS, A CORPORATION OF ILLINOIS.

DOUBLE ENVELOPE.

Application filed August 3, 1925. Serial No. 47,721.

My invention relates to an improvement in envelopes and particularly to an envelope adapted for the simultaneous carriage of mail of difierent classes. One object of my 5 invention is to provide such an envelope in which both first and third class mail may be enclosed Another object is the provision of an envelope of the class described which shall be easy and cheap to make and simple to assemble and which shall be easy to fill. Other objects will appear fromtiine to time in the course of the specification and claims.

I illustrate my invention more or less diagrammatically in the accompanying drawings, wherein:

Figure 1 is a View of one side of the blank of which the envelope is formed;

Figure 2 illustrates a partly folded blank;

Figure 3 illustrates the complete envelope;

Figure 1 is a section on an enlarged scale along the line l4 of Figure 3.

Like parts are-represented by like symbols throughout the specification and drawings.

A generally indicates a blank consisting of the central portion B which forms the back of the completed envelope, the end portion C which forms the front of the envelope proper and the end portion D which forms. the front of the supplemental envelope. Figure 1 illustrates the blank form bottom up, that is to say showing the sides which are inwardly turned or concealed when the envelope is folded into final shape. The end portion C has a gummed flap C at one end and a somewhat larger ungummed flap C at the other. The end portion D has a I gummed flap D at the same side of the 40 blank as the flap C The other edges of the section D are gummed as at D D and a thin gummed flap D continues thence outwardly along the edge of the central section B. Referring to Figure 2, the end section C has been folded over the central section B and the gummed flap C has been folded into place beneath the edge of the section B. and has been gummed in position there. The outside face of the section C, as shown in Figure 2, may if desired carry printed matter. I have indicated the name and address of the sender at the upper left hand corner as at C the indicator for third class mail as at C and the indicator for the posiand instructions for tucking the flap C as at C. At the next step of assembly the end portion D is folded down over the member C as shown in Figure 3 and the gummed portions D D and D are moistened and gummed. D is an aperture in the end member D adapted to expose the name and address of the party to whom the envelope is mailed. The end member D may be provided with printed indications as at D for first class mail, as at D for the location of the stamp and as at D for instruction in sealing.

It will be realized that whereas I have illustrated a practical and operative article that nevertheless many changes might be made in the size, number, shape and disposition of parts without departing from the spirit of my invention and I therefore wish my description-and drawings to be taken as in'a broad sense illustrative rather than as limiting me to my specific showing.

The use and operation of my invention are as follows:

When the form has been folded and gummed as progressively shown in Figures 1 to 3 inclusive the flaps C and D are left open. First class mail may be inserted into the com artment formed by the end member D and t e aperture D permits the exposure of the name and address on the letter being sent. The third class material, for example catalogs or circulars, may be inserted throu h the flap '0'. The fia D is referably rst sealed to the flap 1 and't e two flaps are then tucked in to hold the third class mail in position, as shown in Figure 4 where the first class mail is indicated as X and the third class mail as Y.

It willbe observed that there is a mimmum of loss or wastage in the blank, when cutting it from sheet or rolled stock. The printing is all upon one side of the blank and the gumming upon the other, which results in ease and economy of manufacture. Since the opening or flap of both compartments is along the same side or end 0 the envelope the folding of the envelope is much simplified. It is an advantage also to have the loose flap C at the right hand end of the completed envelope because mail clerks, in sorting mail customarily take the envelope by the upper right hand corner and flip it into the pile or pack into which 1t isto go. Where the flap is at the opposite end of the envelope the momentum of the heavy matter no in the third class mail compartment isfrequently sullicient to tear or disengage the ungummed flap C and in practice a very considerable loss in the mails is thus caused. The envelope D is illustrated with the aperture or window D, but be omitted.

I claim:

1. A blank for a double" compartment envelope consisting of a rectangular central portion, a member lying along one side of said central portion and shaped, when folded over said central portion, to provide an overlapping flap at each end thereof, a member along the opposite side of the central portion including a relatively narrow flap extending along a portion of the side of the central portion and a portion of greater width extending along and terminatingat its end in a laterally extending flap.

, 2. A blank for a double compartment envelope consisting of a rectangular central portion, a member lying along one side of said central portion and shaped, when folded over said central portion, to provide an overlapping flap at each end thereof, a member along the opposite side of the central portion including a relatively narrow flap extending along a portion of the side of the ortion of greater central portion and a width extending along t e rest of said side this of course may the rest of said side,

her along one side of said central member adapted to be folded over it to form the front of one compartment of the envelope, said foldable member being-provided at one end with a gummed flap adapted to surround and be secured to one end of the central portion, and at the other end with a flap, and a member along the other side of the central member adapted to be folded over said first mentioned folded member and to form the front of another compartment, said last mentioned foldable member including a rectangular portion shorter and narrower than the central memberand thefirst mentioned folded member, and having at one end a gummed flap adapted to be gummed to one of the flaps upon the first mentioned foldable member, and. a gummed flap portion extending alon the edge of the central member from the en of the last mentioned foldable menber.

Signed at Chicago, county of Cook and State of Illinois, this 30th day of July, 1925.

CHRISTOPHER F. BACKMYER. 

